* {
    margin: 0;
    padding: 0;
}

.web_page_demo {
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
}

.header {
    width: calc(100% - 32px);
    height: 56px;
    display: flex;
    flex-direction: row;
    justify-content: flex-start;
    align-items: center;
}

.header .back {
    width: 40px;
    height: 40px;
    border-radius: 20px;
    background: rgba(0, 0, 0, 0.05);
    margin-right: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.header .back img {
    width: 24px;
    height: 24px;
}

.header span {
    height: 26px;
    color: rgba(0, 0, 0, 0.9);
    font-family: 鸿蒙黑体;
    font-size: 20px;
    font-weight: 700;
    line-height: 26px;
    letter-spacing: 0px;
    text-align: left;
}

.title {
    color: rgba(0, 0, 0, 0.9);
    font-family: "鸿蒙黑体";
    font-size: 24px;
    font-weight: 700;
    line-height: 22px;
    letter-spacing: 0px;
    text-align: center;
    margin-top: 72px;
}

a {
    margin-top: auto;
    width: calc(100% - 48px);
    height: 40px;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    border-radius: 20px;
    background: rgb(10, 89, 247);
    text-decoration: none;
    color: rgb(255, 255, 255);
    font-family: "鸿蒙黑体";
    font-size: 16px;
    font-weight: 500;
    line-height: 22px;
    letter-spacing: 0px;
    text-align: center;
    margin-bottom: 16px;
}